<template>
    <div class="list" ref="wrapper">
        <div>
        <div class="area">
            <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
            <div class="button-wrapper">
                <div class="button">{{this.currentCity}}</div>
                </div>
        </div>
        
        </div>
        <div class="area">
            <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
            <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
                
                <div class="button">{{item.name}}</div>
                </div>
                 
        </div>
        
        </div>
        
        
        <div class="area" v-for="(item, key) of cities" :key="key"
         :ref="key"   
        >
             <div class="title border-topbottom">{{key}}</div>
             <div class="item-list">
                 <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">
                     {{innerItem.name}}</div>
                 
                 
             </div>
        </div>
        
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
    name: 'CityList',
    props: {
        hot: Array,
        cities: Object,
        letter: String
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    },
    methods : {
        handleCityClick (city) {
            
            this.changeCity(city)
            this.$router.push('/')
            
        },
        ...mapMutations(['changeCity'])
    },
    mounted () {
       this.scroll = new Bscroll(this.$refs.wrapper, {
           click: true
       })
    },
    updated () {
        this.scroll.refresh()
    },
    watch: {
        letter () {
            if (this.letter) {
                const element = this.$refs[this.letter][0]
                //console.log(element)
                this.scroll.scrollToElement(element)
            }
            
        }
    }
}
</script>
<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
          border-color: #ccc
        &:after
          border-color: #ccc
    .border-bottom
        &:before
          border-color: #ccc
    .list
        overflow: hidden
        position: absolute 
        top: 1.58rem
        left: 0
        right: 0
        bottom: 0
       
        .title
            line-height: .54rem
            background: #eee
            padding-left: .2rem
            color: #666
            font-size: .26rem
        .button-list
            overflow: hidden
            padding: .1rem .6rem .1rem .1rem
            .button-wrapper
                float: left
                width: 33.33%
                .button
                    margin: .1rem
                    padding: .1rem 0
                    text-align: center
                    border: .02rem solid #ccc
                    border-radius: .06rem
        .item-list
            .item
                line-height: .76rem
            
                padding-left: .2rem

</style>